Design and Simulation of Improved Integral Separate PID Algorithm Used on LED Source Control System
DING Zu'an
XU Heng
Abstract：In this paper, a reasonable digital PID algorithm is designed for the dual switch forward LED which is in voltage feedback PWM (pulse width modulation) control mode.At first, part of the model is established for the switching mode power supply and digital PID algorithm is designed for the system.The close loop system simulation analysis is used to analyze the shortcomings of the traditional PID algorithm.Aiming at the high overshoot of digital PID algorithm, an improved integral separate PID algorithm is designed by establishing the function with input error and gain coefficients of proportion and differential.System level simulation is conducted in Simulink to compare the output characteristics of the two compensation algorithms.The result show that improved integral PID algorithm can decrease overshoot of the system without changing stabilization and regulating time and get better control performance.
Keywords：LEDintegral separate PIDdual switch forward topologySimulinkpower supplycontrol system
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 96-100 )